<template>
  <div class="cart">
    <h4>全部商品</h4>
    <div class="cart-main">
      <div class="cart-th">
        <div class="cart-th1">全部</div>
        <div class="cart-th2">商品</div>
        <div class="cart-th3">单价（元）</div>
        <div class="cart-th4">数量</div>
        <div class="cart-th5">小计（元）</div>
        <div class="cart-th6">操作</div>
      </div>
      <div v-if="cardList.length" class="cart-body">
        <ul v-for="(c,index) in cardList" :key="c.id" class="cart-list">
          <li class="cart-list-con1">
            <input type="checkbox" name="chk_list" :checked="c.isChecked" @change="changeChecked(c)">
          </li>
          <li class="cart-list-con2">
            <img :src="c.imgUrl">
            <div class="item-msg">{{ c.skuName }}</div>
          </li>
          <li class="cart-list-con4">
            <span class="price">{{ c.skuPrice }}</span>
          </li>
          <li class="cart-list-con5">
            <a @click="changeNum('decre',c)" class="mins">-</a>
            <input autocomplete="off" type="text" :value="c.skuNum" @change="changeNum('input',c,$event)" minnum="1" class="itxt">
            <a @click="changeNum('incre',c)" class="plus">+</a>
          </li>
          <li class="cart-list-con6">
            <span class="sum">{{ c.skuPrice * c.skuNum }}</span>
          </li>
          <li class="cart-list-con7">
            <a @click="deleteOne(c.skuId,index)" class="sindelet">删除</a>
            <br>
          </li>
        </ul>
      </div>
    </div>
    <div v-if="cardList.length" class="cart-tool">
      <div class="select-all">
        <input class="chooseAll" type="checkbox" v-model="changeBatchCard" >
        <span>全选</span>
      </div>
      <div class="option">
        <a  @click="deleteAll">删除选中的商品</a>
      </div>
      <div class="money-box">
        <div class="chosed">已选择
          <span>{{ checkoutCartNum }}</span>件商品</div>
        <div class="sumprice">
          <em>总价（不含运费） ：</em>
          <i class="summoney">{{ checkoutCartPrice }}</i>
        </div>
        <div class="sumbtn">
          <a class="sum-btn" href="###" target="_blank">结算</a>
        </div>
      </div>
    </div>

    <!-- 暂无商品 -->
    <div v-if="!cardList.length" class="empty">
        <h1>购物车空空如也</h1>
        <img src="http://49.232.112.44/img/empty.751bed26.gif" alt="">
    </div>
  </div>
</template>

<script>
import {ReqGetCartList,ReqGetCheckCart,ReqGetBatchCheckCart,ReqGetAddCard,ReqGetDeleteCart,ReqGetSkuIdList} from "@/api"
import {regNum} from "@/utils/reg"
  export default {
    name: 'ShopCart',
    data(){
      return {
        cardList:[]
      }
    },
    methods:{
      async getCartList(){
       let result = await ReqGetCartList()
      //  console.log(result);
       if(result.length){
        this.cardList = result[0].cartInfoList
       }
      },
      async changeChecked(c){
        // console.log(c);

        let {skuId,isChecked} = c

        let newIsChecked = isChecked === 1 ? 0 : 1

       

        
        await ReqGetCheckCart(skuId,newIsChecked)

        c.isChecked = newIsChecked

      },
      async changeNum(type,c,e){
        this.isLock;
        if(this.isLock)return;
        switch (type) {
          case 'input':
                this.isLock = true
                let {skuNum,skuId} = c
                let newNum = e.target.value
                let distNum = newNum-skuNum
                if(regNum.test(newNum)){
                  await ReqGetAddCard(skuId,distNum)
                  c.skuNum = newNum
                }else if(newNum > 200){
                  await ReqGetAddCard(skuId,200 - skuNum)
                  c.skuNum = e.target.value = 200
                }else{
                  e.target.value = skuNum
                }
            break;
          case 'decre':
                this.isLock = true
                if(c.skuNum > 1){
                  await ReqGetAddCard(c.skuId,-1)
                  c.skuNum --
                }
            break;
          case 'incre':
                this.isLock = true
                if(c.skuNum < 200){
                  await ReqGetAddCard(c.skuId,1)
                  c.skuNum ++
                }
            break;
          default:
            break;
        }
        this.isLock = false
        
        
      },
      async deleteOne(id,index){
        let result =  await ReqGetDeleteCart(id)
        // console.log(result);
        // 更新前端状态
        // console.log(this.cartList);
        this.cardList.splice(index,1)
      },
      async deleteAll(){
        // 定义数组 方便追加
        let skuIdList = []
        // 循环  获取isChecked值为1的
         this.cardList.forEach(item => {
          if(item.isChecked === 1){
            skuIdList.push(item.skuId)
          }
        })
        // console.log(skuIdList);
        // 发送请求
        await ReqGetSkuIdList(skuIdList)
        this.cardList = this.cardList.filter(item => {
          return !skuIdList.includes(item.skuId)
        })
      }
    },
    computed:{
      changeBatchCard:{
        get(){
          return this.cardList.every(item => item.isChecked === 1)
        },
        async set(value){
          let skuIdList = this.cardList.map(item => item.skuId)
          let newValue = value ? 1 : 0
          await ReqGetBatchCheckCart(skuIdList,newValue)
          this.cardList.forEach(item => item.isChecked = newValue)
        }
      },
      checkoutCartPrice(){
        return this.cardList.reduce((prev,item)=>{
            if(item.isChecked){
                prev+=item.skuNum * item.skuPrice
            }
            return prev
        },0)
      },
      checkoutCartNum(){
        return this.cardList.reduce((prev,item)=>{
            if(item.isChecked){
              prev += item.skuNum*1
            }
            return prev
        },0)
      }
    },
    mounted(){
      this.getCartList()
    }
  }

</script>

<style lang="less" scoped>
.cart {
  width: 1200px;
  margin: 0 auto;
  h4 {
    margin: 9px 0;
    font-size: 14px;
    line-height: 21px;
  }
  .cart-main {
    .cart-th {
      background: #f5f5f5;
      border: 1px solid #ddd;
      padding: 10px;
      overflow: hidden;
      & > div {
        float: left;
      }
      .cart-th1 {
        width: 25%;
        input {
          vertical-align: middle;
        }
        span {
          vertical-align: middle;
        }
      }
      .cart-th2 {
        width: 25%;
      }
      .cart-th3,
      .cart-th4,
      .cart-th5,
      .cart-th6 {
        width: 12.5%;
      }
    }
    .cart-body {
      margin: 15px 0;
      border: 1px solid #ddd;
      .cart-list {
        padding: 10px;
        border-bottom: 1px solid #ddd;
        overflow: hidden;
        & > li {
          float: left;
        }
        .cart-list-con1 {
          width: 15%;
        }
        .cart-list-con2 {
          width: 35%;
          img {
            width: 82px;
            height: 82px;
            float: left;
          }
          .item-msg {
            float: left;
            width: 150px;
            margin: 0 10px;
            line-height: 18px;
          }
        }
        .cart-list-con4 {
          width: 10%;
        }
        .cart-list-con5 {
          width: 17%;
          .mins {
            border: 1px solid #ddd;
            border-right: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
						text-decoration: none;
          }
          input {
            border: 1px solid #ddd;
            width: 40px;
            height: 31px;
            float: left;
            text-align: center;
            font-size: 14px;
          }

          .plus {
            border: 1px solid #ddd;
            border-left: 0;
            float: left;
            color: #666;
            width: 6px;
            text-align: center;
            padding: 8px;
						text-decoration: none;
          }
        }

        .cart-list-con6 {
          width: 10%;

          .sum {
            font-size: 16px;
          }
        }

        .cart-list-con7 {
          width: 13%;

          a {
            color: #666;
          }
        }
      }
    }
  }
  .cart-tool {
    overflow: hidden;
    border: 1px solid #ddd;

    .select-all {
      padding: 10px;
      overflow: hidden;
      float: left;

      span {
        vertical-align: middle;
      }

      input {
        vertical-align: middle;
      }
    }

    .option {
      padding: 10px;
      overflow: hidden;
      float: left;

      a {
        float: left;
        padding: 0 10px;
        color: #666;
      }
    }

    .money-box {
      float: right;

      .chosed {
        line-height: 26px;
        float: left;
        padding: 0 10px;
      }

      .sumprice {
        width: 200px;
        line-height: 22px;
        float: left;
        padding: 0 10px;

        .summoney {
          color: #c81623;
          font-size: 16px;
        }
      }
			

      .sumbtn {
        float: right;
        a {
          display: block;
          position: relative;
          width: 96px;
          height: 52px;
          line-height: 52px;
          color: #fff;
          text-align: center;
          font-size: 18px;
          font-family: "Microsoft YaHei";
          background: #e1251b;
          overflow: hidden;
					text-decoration: none;
					&hover {
						color: white !important;
					}
        }
      }
    }
  }
  .empty{
    color: gray;
    margin-top: 50px;
    text-align: center;
    img{
      width: 300px;
    }
  }
}
</style>